Can't use enum class as unordered_map key

Question

I have a class containing an enum class.

class Shader {
public:
    enum class Type {
        Vertex   = GL_VERTEX_SHADER,
        Geometry = GL_GEOMETRY_SHA         


        

Answer 1

When you use std::unordered_map, you know you need a hash function. For built-in or STL types, there are defaults available, but not for user-defined ones. If you just need a map, why don't you try std::map?